Home / 285,945.60-428,921.46-86,267.70

Finding the Fourth Proportional to 285,945.60, 428,921.46 and 86,267.70

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Solution

The fourth proportional to 285,945.60, 428,921.46 and 86,267.70 is: 129,402.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,945.60 : 428,921.46 = 86,267.70 : x
  2. Step 2: Convert to fraction form
    285,945.60/428,921.46 = 86,267.70/x
  3. Step 3: Cross multiply
    285,945.60x = 428,921.46 × 86,267.70
  4. Step 4: Simplify right side
    285,945.60x = 37,002,067,834.84
  5. Step 5: Solve for x
    x = 37,002,067,834.84/285,945.60
  6. Step 6: Final answer
    x = 129,402.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.